A bill to amend section 16 of the act of March 3, 1899 (30 Stat. 1121, 1153, ch. 425; 33 U.S.C. 411 and 412).

Increases the penalty for wrongful deposit of refuse into harbors or navigable waters of a fine of between $10,000 and $25,000 for each day's violation.

Permits persons to file civil suits against violators if the Attorney General does not institute a civil or criminal action with 60 days after notice of such pollution.

Imposes civil and criminal penalties upon a master or pilot towing any vessel loaded with deposits of debris from mines or stamp works. (Amends 33 U.S.C. 411)